只能输入金额（不包括 - 号，最多两位小数）
Vue.directive('enterMoney', { inserted: function (el) { el.addEventListener('keypress', function (e) { e = e || window.event const charcode = typeof e.charCode === 'number' ? e.charCode : e.keyCode const re = /\d/ if (el.children[0].value && el.children[0].value.includes('.')) { let oldLen = el.children[0].value.substr(0, el.children[0].value.indexOf('.')) if (el.children[0].value.length === oldLen.length + 3) { e.preventDefault() } } if (charcode === 46) { if (el.children[0].value.includes('.') || !el.children[0].value) { e.preventDefault() } return } else if (!re.test(String.fromCharCode(charcode)) && charcode > 9 && !e.ctrlKey) { if (e.preventDefault) { e.preventDefault() } else { e.returnValue = false } } }) }})
<el-input v-enter-money placeholder="请输入金额"></el-input>
